view release on metacpan or  search on metacpan

include/boost/detail/sp_counted_base_cw_x86.hpp  view on Meta::CPAN

#ifndef BOOST_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED
#define BOOST_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED

// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif

//
//  detail/sp_counted_base_cw_x86.hpp - CodeWarrion on 486+
//
//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
//  Copyright 2004-2005 Peter Dimov
//  Copyright 2005 Rene Rivera
//
//  Distributed under the Boost Software License, Version 1.0. (See
//  accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)
//
//
//  Lock-free algorithm by Alexander Terekhov
//
//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
//  formulation
//

#include <typeinfo>

namespace boost
{

namespace detail
{

inline int atomic_exchange_and_add( int * pw, int dv )
{
    // int r = *pw;
    // *pw += dv;
    // return r;

    asm
    {
        mov esi, [pw]
        mov eax, dv
        lock xadd dword ptr [esi], eax
    }
}

inline void atomic_increment( int * pw )
{
    //atomic_exchange_and_add( pw, 1 );

    asm
    {
        mov esi, [pw]
        lock inc dword ptr [esi]
    }
}

inline int atomic_conditional_increment( int * pw )
{
    // int rv = *pw;
    // if( rv != 0 ) ++*pw;
    // return rv;

    asm
    {
        mov esi, [pw]
        mov eax, dword ptr [esi]
    L0:
        test eax, eax
        je L1
        mov ebx, eax
        inc ebx
        lock cmpxchg dword ptr [esi], ebx
        jne L0
    L1:
    }
}

class sp_counted_base
{
private: